Adjustable stroke metering pump



May 5, 1942. MQ MADSEN ETAL ADJUSTABLE STROKE METEEING PUMP Filed July 18, 1938 4 Sheets-Sheet 1 l FI,

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ADJUSTABLE STROKE METERING PUMP Filed July 18, 1958 4 sheets-sheet 3 May 5, 1942. 2 M MADSEN ETAL 2,281,777

ADJUSTABLE STROKE METERING PUMP Filed July 18, 1938 4 Sheets-Sheet 4 n n [7L o 4 50.

4 JC? 47 549 48 25a f v A TTORNEY Patented May 5, 1942 l UNITED STATES PATENT oli-rice ADJUSTABLE STROKE METERING PUMP Martin Madsen, Alhambra, and Albert H. Ziegler, Hollywood, Calif., assignors to Madsen Iron Works, Huntington Park, Calif., a corporation of California Application July 18, 1938, SerialNo. 219,874

2 Claims. ,i (Cl. 'Z4- 40) Our invention relates to means for delivering the distance of the fulcrum point of the rocker a measured quantity of iiuid continuously over arm relative to its ends, and means for transan extended period of time, and the invention mitting a reciprocating motion to the outer end relates in partic-ular to a metering pump adjustci the rocker arm.

able during its operation to vary the volumetric'r .S Further objects and advantages of the invendelivery or measured flow of the liquid delivered. tion will be brought out in the following part oi Although our present invention may be used to the specification.

deliver a continuous measured ilow of various Referring to the drawings which are for illusiiuids, it is of especial utility in road making may trative purposes only:

chines of the character disclosed in the applicail Fig. l is a plan view of a preferred embodiment tion of Martin Madsen, Serial No. 123,183, filed of our invention.

January 30, 1937, this road making machine in- Fig. 2 is a partly sectioned side elevation of the cluding a vehicle adapted to be moved continudevice shown in Fig. l. ously along the road and having a mixer to con- Fig. 3 iS a partly SeCtiOned face View leeling tinuously receive aggregate road surfacing maii) toward the Tight end -Of the device ShOWIl in terial and to discharge such material thoroughly Fig. 2.

mixed with a binder and in condition to be spread Fig. 4 ie a fragmentary see-tien taken On a out so as to form a road surfacing layer. In a Diane represented by the line 4-4 0f Fig. 2-

road making device of this character, best re-y Fig. 5 is a'fragrnen'ery Section teken as indisults are obtained only when the proper porpor- "i9 cated by the line 5 5 of Fig. 3.

tion of binder material is mixed with the aggre- As shown in Figs. 1 and 2, the metering pump gate materials which are placed in ridges or includes a pump member HJ Comprising a casing windrows along the path travelled by the road having formed therein in side-by-side relation a making machine. To accomplish this proporpair 0f double acting pump units including pistionate delivery of the binder, which is or- "1" ton rods Il, each of which, as shown in Fig- 2, dinarily an asphalt road oil, to the aggregate is connected to a movable fluid displacing wall materials, a displacement pump is connected so in the form of a pisten i2 Whieh Slides in f1 Cylinthat its speed of operation Will vary in accordder I3 S0 as t0 move fluid hrOugh ports l5 leadance with the speed of forward trave1 of the I ing into a valve manifold structure I5 having road making machine, and consequently so thatI im intake and discharge valves which are not shown a given quantity of binder will be fed to the lin detail owing to the fact that they correspond aggregate materials during each and every unit to general practice. By means of screws IB a distance of forward travel of the road making support I9 is secured to the rod end of the pump machine. member I0, this support l 9 having a vertical Wall It is an object of the present invention to prof3-i" 20 at the Aleft end thereof', a box-like central vide a simple and durable variable volume pump portion 2l, and a cross-head guide Section 22 adapted so as to be continuously operated to deformed so as to provide cross-head guides 23 and liver a ow of uid at a rate determined in ac- 23al lying in Side-by-Side leleiien.

cordance with the setting of the adjustable parts As best shown in Figs. 3 and 5, the cross-head of the pump. l@ guides 23 and 23a have substantially cylindrical It is a further object of the invention to probores 24 axially aligned with the piston rods Il.

vide a metering pump of the character above Cross-heads 25 and 25a are threaded on the outer described, having a drive operable at constant ends of the pStOn reds l, es Shown ai? 26, these speed, and means for the variable transmission cross-heads each comprising a cylindrical body of motion from this drive member to a pump 45 having a shallow annular channel 21 intermepiston, diate its end, a vertically disposed opening or It is a further object of the invention to prochamber 28, and a lateral bore 29 in each side vide a metering pump, the volumetric delivery of wall 3B of the cross-head to receive a pin 3l. which may be varied during the operation there- The pins 3| may be placed in the positions in of. 50 which they are shown through lateral, horizon- A further object of the invention is to provide Belly elongated Openings 32 in the Walls of the in a measured flow fluid delivery device a pumpguides 23 and 23a. A support 33 is secured to ing chamber having amovable wall, a rocker arm the upper Wall 34 0f the Central Section 2l 0f connected to this wall, and pivot means adapted the member I9 by means 4of screws 35. The supto be moved along the rocker arm so as to vary 55 port 33 extends substantially normal to the piston rods I I and at the upper end thereof has bearings 36 for a crank shaft 31 provided with cranks 3B and 38a disposed respectively in the same vertical planes as the cross-heads 25 and 25a.

To slidably support a body 39, the support 33 has a slide 4I| extending substantially normal to the plane dened by the piston rods I I. As best shown in Fig. 4, the slide 49 is of dovetailed crosssection and has converging side walls 4|, one of which carries a gib 42. The body 39 comprises` a casting 43 having a wedge portion 44 to slide vertically in the slide 40 and bearing supports or journals 45 and 46 secured to the outer face of the casting 43 by screws 41. The members 45 have inwardly faced recesses 48, and the member 45 has opposed recesses 43, carrying ball bearings 49 to receive trunnions 53 which project diametrally from blocks I of cylindrical form.

The blocks 5I have bores 52 to slidably receive rocker arms 53 and 53a, the lower ends of which are connected to the cross-heads 25 and 25a, and the upper ends of which are connected by means of connecting rods 54 and 54a with the cranks 38 and 38a. The body 3.9, the trunnions 5I), and the blocks 5I cooperate in forming adjustable pivot means for the rocker arms 53 and 53a so that the angular swinging movement of the rocker arms resulting from the oscillation of their upper ends by the cranks 38 and 38a may be varied, thereby varying the distance the piston rods Il and the pistons I2 are caused to move as the result of the movement of the lower ends of the rocker arms 53 and 53a. Vertical movement of the body 39 so as to carry the trunnions 50 and the blocks 5I upwardly or downwardly relative to the respective ends of the rocker arms 53 and 53a is providedin the form of a screw 55 which makes threaded engagement with the upper part 53 of the body 39, as shown in Fig. 2, and is restrained from vertical or axial movement by collars 5l and 58 lying on opposite sides of a bracket 59 provided with an opening 60 through which an upper portion of the screw 55 passes, the upper extremity 6| of the screw 55 being prepared for engagement by a tool to rotate the screw 55 and thereby adjust the pivot means of the rocker arms while the metering pump is in operation.

The upper ends of the rocker arms 53 and 53a are provided with threads 62 for the securement of clevises 63 carrying pivot pins 64 through which connection with the outer ends of the connecting rods 54 and 54a is made. As best shown in Fig. 3, the lower ends of the rocker arms 53 and 53a are attened so as to provide tongues 65 to project into the vertical openings 28 of the cross-heads 25 and 25a, these tongues 66 having openings 6I to receive the central portions of the pivot pins 3l, screws 68 being provided. The

connement of the cross-heads 25 and 25a in the t guides 23 and 23a constrains these cross-heads and the pivot pins 3l to straight line movement parallel to the lines of movement of the piston rods II. Accordingly, the rocker arms 53 and 53a slide up and down through theblocks 5I as they are rocked by the action of the cranks. The portions of the rocker arms respectively above and below the pivot means 50 constitute levers which may be varied in length. The distance through which the upper end of each rocker arm is swung remains constant, since the upper ends of these rocker arms are directly connected to the cranks by the connecting rods.

The movement of the cross-heads 25 and 25a, and of the pistons I2 connected thereto, may be made much shorter than the movement of the connecting rods, as when the block 39 is in or below a lowered position, such as shown in Fig. 2. As the body 39 is raised the swing of the lower ends of the rocker arms will be correspondingly increased; therefore, by use of the screw 55 it is possible to vary the distance of travel of the pistons I2 from one extreme to the other and to cause these pistons I2 to selectively continuously pump a flow of iiuid of a volume within the limits of adjustment of the device. Ordinarily the crank shaft 31 is operated at constant speed and the rate of fluid discharge is controlled by adjustment of the position of the pivot means 55. The slide 49 is provided with calibrations 'IIl to indicate the displacement of the metering pump for different settings of the body 39 along the slide 40.

We claim as our invention:

1. In a metering attachment for use with a displacement pump of the character described having a reciprocative wall and a stationary wall structure to cooperate with said reciprocative wall, the combination of: an extension connected to said stationary wall so as to project therefrom, and having a guide lying along a line agreeing with the direction of movement of said reciprocative Wall, a body slidable in said guide; a rod connecting said body to said reciprocative Wall; a support projecting at right angles to said line, said support having a slide along a side thereof and bearing means to the outer end thereof; a member supported by said slide, said member having pivot means; a rocker arm pivotally connected to said body and projecting outwardly therefrom along said slide; a block having an opening therein through which said rocker arm is slidable, said block being connected through said pivot means with said member; a crank carried by said bearing means; a connecting rod connecting the outer end of said rocker arm with said crank so that rotation of said crank will produce reciprocation of the outer end of said rocker arm and a swinging movement of said rocker arm on said pivot means; and a screw extending along saidv support to move said member on said slide whereby to move said pivot means.

2. In a metering drive device of the character described, for use with a displacement pump member having a movable wall and inlet and outlet valve means, the combination of a rocker arm having its inner end connected to said movable wall; a supporting member disposed intermediate the ends of said rocker arm; a body carried by said supporting member so as to be movable along said rocker arm; pivot means carried by said body, said pivot means engaging said rocker arm and being movable therealong as said body is moved on said supporting member so that the distance of said pivot means from the respective ends of said rocker arm may be varied; means operative to impart an oscillating motion to the outer end of said rocker arm so that it will swing on said pivot means and impart movement through its inner end to said movable wall; means providing calibrations; and a member moving relative to said calibrations in .accordance with the movement 'of said pivot means along said rocker arm.

MARTIN MADSEN. ALBERT H. ZIEGLER. 

